vijaydev

Array.prototype.forEach.call($$("#NA_block img"), function(el) { 
  if (el.attributes.src.value.indexOf("status0") !== -1)
    el.parentNode.parentNode.style.display = 'none';
});

vijaydev

Use ssh-copy-id to install your public key in a remote machine's authorized_keys. Also takes care of the permissions of the remote user's .ssh and .ssh/authorized_keys.

ssh -t reachable_host ssh unreachable_host. Enables to connect to a host unreachable from current network but reachable from reachable_host's network.

To navigate to a directory, run a command and get back: (cd /to/dir && cmd_to_run)

To rip audio out of a video file: mplayer -ao pcm -vo null -vc dummy -dumpaudio -dumpfile <out_file> <in_file>

Rsync: rsync --recursive -avz -e "ssh -p 2020" user@machine:/path dest

vijaydev

run "rm public/index.html"
generate(:scaffold, "item name:string")
route "root :to => 'items#index'"

rake("db:migrate", "production")

gem 'ruby-openid'
gem 'will-paginate', :git => 'git://github.com/mislav/will_paginate.git'
add_source "http://code.whytheluckystiff.net"
gem "hpricot", :version => '0.6'

vijaydev

"ensure" makes sure code is run regardless of begin-rescue outcome. (equivalent of Java finally)

Pass a number parameter to Array#first and Array#last to get the first n or the last n values.

http://rubyquicktips.tumblr.com/post/870337608/grep-anything-from-your-enumerables

vijaydev

rvm use ree-1.8.7-2010.02@global
rvm gemset create rails2310
gem install rails -v=2.3.10

vijaydev

Dir[File.join(File.dirname(__FILE__), '..', 'vendor', 'gems', 'hoptoad_notifier-*')].each do |vendored_notifier|
  $: << File.join(vendored_notifier, 'lib')
end

vijaydev

SubdomainFu.configure do |config|
  config.tld_size = 1
  config.mirrors = %w( support blog www billing help api )
  config.preferred_mirror = 'www'
end

vijaydev

.s@\(\d\+\)@\=(submatch(1) + 17)@

Search for numbers and replace them with results of expressions involving them. submatch(1) is \1 (groups in regexes)

vijaydev

#@data = Hash.new { |h,k| h[k] = Hash.new { |h1,k1| h1[k1] = Array.new(8) {0} } } #Interesting

vijaydev

    allotments = []
    params[:roles_divisions].map do |rd|
      rd[2].each do |d|
        allotments << Allotment.create(:user_id => @user.id, :division_id => d.to_i, :role_name => rd[0])
      end
    end
    @user.allotments = allotments